Fiberizing spinner for the manufacture of low diameter, high quality fibers
An apparatus for manufacturing low diameter, high quality glass wool fibers, and more particularly to a spinner for centrifuging low diameter glass wool fibers to improve light-density building insulation is disclosed. The spinner includes a number of glass orifices positioned predetermined column angle and provides a hole pattern that improves the quality of the glass. The improved hole pattern is determined by experimentation and may be implemented in any glass fiberization process.
1 . A spinner for use in fiberizing thermoplastic fibers, comprising:
a peripheral sidewall having a height and a plurality of orifices formed in said sidewall wherein, said orifices are formed in a band on an upper portion of said sidewall and define an upper foraminous band and a lower substantially non-foraminous band.
2 . The spinner of claim 1 , wherein said substantially non-foraminous band is at least 10% of the height of the sidewall.
3 . The spinner of claim 1 , wherein said foraminous band is at least 50% of the height of the sidewall.
4 . The spinner of claim 1 , wherein said foraminous band is at least 75% of the height of the sidewall.
5 . The spinner of claim 1 , wherein said foraminous band is at least 90% of the height of the sidewall.
6 . A method of improving the k-value of glasswool comprising the steps of:
determining the column angle of a spinner to minimize the thermal conductivity of fibrous insulation batts produced from a spinner; and
manufacturing.
7 . The spinner of claim 6 , wherein the column angle is approximately 30°.
8 . The spinner of claim 6 , wherein the column angle is approximately 22°.
9 . The spinner of claim 6 , wherein the column angle is approximately 45°.
10 . The spinner of claim 6 , wherein the column angle is approximately 68°.
11 . A spinner for the manufacture of glasswool, comprising:
a rotatable peripheral sidewall; and a plurality of orifices penetrating said sidewall, said orifices being aligned at a predetermined column angle;
wherein the column angle is selected based on experimentation to minimize the thermal conductivity of fibrous insulation produced therefrom.
12 . The spinner of claim 11 , wherein the column angle improves the k-value of the glasswool by at least about 2 k-points with respect to glasswool of a similar fiber diameter.
13 . The spinner of claim 11 , wherein the column angle is approximately 30°.
14 . The spinner of claim 11 , wherein the column angle is approximately 22°.
15 . The spinner of claim 11 , wherein the column angle is approximately 45°.
16 . The spinner of claim 11 , wherein the column angle is approximately 68°.
17 . The spinner of claim 11 , further comprising:
a nonforminous band positioned at the lower end of said rotatable peripheral sidewall.
18 . The spinner of claim 17 , wherein said nonformainous band is between about 10% and 50% of the height of the sidewall.
19 . The spinner of claim 17 , wherein said foraminous band is at least 75% of the height of the sidewall.
20 . The spinner of claim 11 , wherein the column angle improves the k-value of the glasswool by at least about 1.5 k-points with respect to glasswool of a similar fiber diameter.